I turned on the two remaining loops in the ASC system to see if we can lock. I put in some ones into the WFS_OUTPUT matrix

and locked the MC2_TRANS_PIT and MC2_TRANS_YAW loops.
The effect of doing so is visible in the error signals. The black loops are with all ASC loops off, Blue traces are with the WFS1 and 2 loops locked and Red traces are with all loops locked. I took the red traces to a lower frequency to see if the suppression of the error signals at low frequencies is disturbed by the switching on of the MC2_TRANS loops. They seem to be working fine without adding any perturbation above the UGF.

I measured the Transfer Function coefs (at 10Hz using the WFS Lockins) with MC2_TRANS loops locked in this rudimentary fashion
|
WFS1P |
WFS2P |
MC2TP |
WFS1Y |
WFS2Y |
MC2TY |
MC1P |
-23.8541 |
15.2501 |
-24.3470 |
-3.3166 |
-2.0473 |
-0.1202 |
MC2P |
29.7402 |
54.7689 |
29.5102 |
-0.2922 |
-17.4226 |
0.0310 |
MC3P |
34.3612 |
10.7279 |
33.9650 |
6.6582 |
-4.0892 |
0.2333 |
MC1Y |
0.9510 |
-6.3929 |
0.8722 |
-98.2414 |
-82.9129 |
-4.2802 |
MC2Y |
12.0673 |
6.1708 |
11.9502 |
237.1172 |
20.7970 |
14.6480 |
MC3Y |
-0.8498 |
2.8712 |
-1.4195 |
-20.6031 |
111.2531 |
-1.5234 |
The green and blue bits are the only relevant parts since we ignore the off diagonal parts. And most of these off diagonal coefs are indeed quite small (<5% of the max). I have marked the not-so-small ones in yellow.
I then calculated the output matrix elements in two different ways.
a) Using a null vector in the place of MC_DoF --> MC2_TRANS transfer coefs. The output matrix we get is
|
WFS1P |
WFS2P |
Null Vector |
MC1P |
-1.0000 |
0.8271 |
-0.8880 |
MC2P |
0.0962 |
1.0000 |
0.4431 |
MC3P |
0.9306 |
-0.2913 |
-1.0000 |
|
WFS1Y |
WFS2Y |
Null Vector |
MC1Y |
-0.2340 |
-0.5840 |
1.0000 |
MC2Y |
1.000o |
-0.1551 |
0.4714 |
MC3Y |
-0.3613 |
1.0000 |
0.6571 |
b) Without using the null vector. i.e. using the MC_DoF --> MC2_TRANS transfer coefs and inverting the full matrix. The output matrix we get is
|
WFS1P |
WFS2P |
MC2TP |
MC1P |
0.1471 |
-0.8880 |
0.8655 |
MC2P |
1.0000 |
0.4431 |
-0.4369 |
MC3P |
-0.7634 |
-1.0000 |
1.0000 |
|
WFS1Y |
WFS2Y |
MC2TP |
MC1Y |
0.1401 |
1.0000 |
-1.0000 |
MC2Y |
0.1449 |
0.4714 |
-0.3627 |
MC3Y |
1.0000 |
0.6571 |
-0.6775 |
I plan to try out these two output matrices and measure the OL TFs of the MC2_TRANS and see if we can include these into ASC in a useful fashion. |